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package main
import (
"fmt"
"os"
"text/tabwriter"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
"github.com/projectatomic/libpod/libpod"
"github.com/urfave/cli"
)
var (
topFlags = []cli.Flag{
LatestFlag,
}
topDescription = `
podman top
Display the running processes of the container.
`
topCommand = cli.Command{
Name: "top",
Usage: "Display the running processes of a container",
Description: topDescription,
Flags: topFlags,
Action: topCmd,
ArgsUsage: "CONTAINER-NAME",
SkipArgReorder: true,
}
)
func topCmd(c *cli.Context) error {
var container *libpod.Container
var err error
args := c.Args()
if len(args) < 1 && !c.Bool("latest") {
return errors.Errorf("you must provide the name or id of a running container")
}
if err := validateFlags(c, topFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
if c.Bool("latest") {
container, err = runtime.GetLatestContainer()
} else {
container, err = runtime.LookupContainer(args[0])
}
if err != nil {
return errors.Wrapf(err, "unable to lookup %s", args[0])
}
conStat, err := container.State()
if err != nil {
return errors.Wrapf(err, "unable to look up state for %s", args[0])
}
if conStat != libpod.ContainerStateRunning {
return errors.Errorf("top can only be used on running containers")
}
psOutput, err := container.GetContainerPidInformation([]string{})
if err != nil {
return err
}
w := tabwriter.NewWriter(os.Stdout, 20, 1, 3, ' ', 0)
for _, proc := range psOutput {
fmt.Fprintln(w, proc)
}
w.Flush()
return nil
}
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